Amp-hours calculation

[ban-all-sheds]

The SI unit of energy is the joule (J) or newton-meter (N * m).

Where in the above is there any reference to time.

In the N.m part.

1 Newton is the amount of force needed to accelerate 1 kg of mass at the rate of 1 meter per second squared.

 

[Grizzly]

The SI unit of energy is the joule (J)

True

or newton-meter (N * m).

No.
'N m' is not the SI unit of energy. It is, however, a way of expressing the derived quantity of energy in terms of other SI units, in this case the newton and the metre.
There is a difference.

The joule is also the SI unit of work.

To be exact, the joule is the SI unit of the derived quantity of energy, work, amount of heat.
Check it out, from the people who publish the units themselves: http://www.bipm.org/en/si/si_brochure/chapter2/2-2/table3.html
You'll also notice an interesting thing in the 5th column of the table on that page...

Where in the above is there any reference to time. Be it a lump of coal or a tank full of petrol or even a bottle of Lucozade they all have energy non have any time involved in any way.

This whole discussion is going over your head somewhat, isn't it?